When assigning a final variable to a variable, even if the final variable’s data type is wider than the variable, if the value is within the range of the variable an implicit conversion is done.
final int a = 10;
b = a; // Legal, since value of ‘a’ is determinable and within range of b
final int x = a;
b = x; // Legal, since value of ‘x’ is determinable and within range of b
final int z = y;
b = z; // Illegal, since value of ‘z’ is not determinable
[velmurugans study notes]